Table 2 AUDIT-C threshold for drinking above weekly limits (female)
From: Validation of the AUDIT-C in adults seeking help with their drinking online
AUDIT-C score | Sensitivity  % (95% CI) | Specificity  % (95% CI) | LR+a (95% CI) | LR−b (95% CI) | Sensitivity + specificity | % Correctly classified (95% CI) |
|---|---|---|---|---|---|---|
≥2 | 99.95 (99.70, 100.0) | 3.95 (1.60, 7.98) | 1.04 (0.50, 2.15) | 0.01 (0.00, 0.07) | 103.90 | 91.67 (90.39, 92.83) |
≥3 | 99.95 (99.70, 100.0) | 5.65 (2.74, 10.14) | 1.06 (0.58, 1.94) | 0.01 (0.00, 0.07) | 105.60 | 91.82 (90.55, 92.97) |
≥4* | 99.63 (99.23, 99.85) | 16.38 (11.26, 22.68) | 1.19 (0.85, 1.66) | 0.02 (0.01, 0.04) | 116.01 | 92.45 (91.22, 93.56) |
≥5 | 97.92 (97.17, 98.52) | 33.90 (26.97, 41.38) | 1.48 (1.20, 1.82) | 0.06 (0.04, 0.08) | 131.82 | 92.40 (91.17, 93.51) |
≥6 | 92.06 (90.74, 93.24) | 50.85 (43.24, 58.43) | 1.87 (1.62, 2.16) | 0.16 (0.13, 0.20) | 142.91 | 88.50 (87.05, 89.85) |
≥7 | 81.88 (80.06, 83.60) | 68.93 (61.55, 75.66) | 2.63 (2.38, 2.91) | 0.26 (0.20, 0.33) | 150.81 | 80.76 (78.99, 82.44) |
≥8** | 69.78 (67.64, 71.85) | 81.92 (75.45, 87.29) | 3.86 (3.58, 4.16) | 0.37 (0.27, 0.51) | 151.70 | 70.82 (68.80, 72.78) |
≥9 | 48.61 (46.33, 50.90) | 91.53 (86.41, 95.18) | 5.74 (5.38, 6.12) | 0.56 (0.34, 0.91) | 140.14 | 52.31 (50.13, 54.49) |
≥10 | 28.14 (26.12, 30.24) | 97.18 (93.53, 99.08) | 9.96 (9.23, 10.75) | 0.74 (0.31, 1.76) | 125.32 | 34.10 (32.05, 36.19) |